Mechanical and rheological properties of polystyrene-block-polybutadiene-blockpolystyrene copolymer reinforced with carbon nanotubes: Effect of processing conditions

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Styrene-b-butadiene-b-styrene (SBS)-based nanocomposites filled with unmodified and -COOH functionalized carbon nanotubes (CNTs) have been formulated at different processing conditions in order to provide an understanding of the influence of the processing temperature and mixing speed on the nanofillers dispersion and on the overall properties of the nanocomposites. The evaluation of the nanocomposites' mechanical and rheological behavior reveals that the effect of the processing speed on the final properties is almost negligible. Differently, the processing temperature influences strongly the mechanical and rheological properties of SBS-based nanocomposites. Indeed, for the nanocomposites formulated at high temperatures a significant enhancement of the overall properties with respect to the neat matrix has been achieved. Moreover, morphological analyses show that the state of dispersion of both unmodified and functionalized CNTs progressively improves as the processing temperature increases. Particularly, at low processing temperatures a segregated morphology in which the nanofillers are selectively confined in the domains of the SBS matrix has been obtained, while the nanocomposites formulated at 180°C show a homogeneous and uniform CNTs dispersion throughout the matrix and a strong level of interfacial adhesion between the copolymer chains and the dispersed nanofillers.
Original languageEnglish
Pages (from-to)107-117
Number of pages11
JournalJournal of Polymer Engineering
Volume38
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Mechanical and rheological properties of polystyrene-block-polybutadiene-blockpolystyrene copolymer reinforced with carbon nanotubes: Effect of processing conditions'. Together they form a unique fingerprint.

Cite this